Copying-press



@N0 Model.)

` G;V W. WILLIAMS.

COPYING PRESS.

No. 301,211.8.r

Patented July 1, 1884,.'

' Q9 ya m gm. d ,2%

' N. Frrzns mammgnpw. washingnw. n.6.

NITED 4Srafrns f vPirrsN'r rrics.

GEORGE W'. WILLIAMS, OF CHICAGO, ILLINOIS.

COPYING-PRESS.

SPECIFICATION forming part of Letters Patent No. 301,418, dated July 1,1884. Application filed November 26. 1883. (No model.)

To afZZ whom it may concern: .y

Be it known that I, GEORGE W. WILLIAMS, of Chicago, county of Cook, andState of Illinois, have invented certain new and useful Improvements ina Copying-Press, ofV which the followingis afull, clear, and exactdescription, that will enable others to make and use the same, referencebeing had to the accompanying drawings, formingapart of thisspecication. l

This invention relates to improvements in that class of devices used fortaking impression copies di' Written matter upon dampened pages bysubjecting the same to a mechanical pressure, the object being toprovide a press that is easily and conveniently operated, and at thesame time one that obviates the objectionable features of the ordinaryscrew-press.

The nature of this invention consists in the employment, arrangement,and construction of certain `novel featureaas will be hereinafter morefully set forth in detail.

Figure l is a view in perspective of a press embodying my improvedfeatures. Fig. 2 is a side elevation showing a part removed and a partin section, and embodying a modification with reference to an eccentricor curved slot in the cam-foot. Fig. 3 is a top view of the vertical boxthrough which the central standard passes. Fig. 4 shows a part brokenawayl from Fig. 1, the journal-cap'being removed to expose the interior.l

Referring to the drawings, Arepresents the base of the press, B thearched bridge, and C the platen. The standard Dis cast integral with theplaten C and extends up through the vertical box a in the bridge B. Thisstandard is reduced in size from the lower end of the box a upward,thereby forming the shoulder ci', which provides the lower bearing forthe spiral spring ci, that is coiled around said standard. The boxe 'isformed with the chamber a3 for the reception of the spiral-spring, asshown in Figs. 2 and fi of the drawings.

The box o: is provided with the removable cap a4, which is cut away, soas to have the shoulder-bearing t on the companion part of theboxii'ormed in the bridge, thus relieving the bolts attaching said capfrom any undue strain.

Forlight presses the standard D may be of about the same diameter theentire length, and

provided with the annular iiange D to forni the bearing for the lowerend of the spring. Y The lower end of the lever E is provided with thecamfoot F, which is cut out length- Wise th rough the center, so as toadapt the same lto straddle the upper end of the standard D,

platen, and the power to make the impression is applied automatically bysimply allowing the lever E to assume a perpendicular position, as shownin Fig. 1 of the drawings.

The arched bridge is provided at each side with the upward-projectinglocking-hooks d d', which serves the purpose of securing and holding thelever E in a horizontal position when the platen is raised up to removethe matter from the press. The lever may be moved toward either endofthe press, as may be the most convenient. The curved bearing of thecam-foot on the top of the box in the bridge gives such a leverage thatbut very little power is required to raise the platen in order to removethe'copying matter, and when the end of the lever is released from thelool;- ing-hook it will at once assume a vertical position, and thespring a2 Will automatically apply the required pressure. Each end ofthe platen is provided with the guide-lugs di, which engage with therecesses d3 on the iuside of and at each end of the arched bridge.Extending out horizontally from the bottom o f these recesses are thechannels 14,(shown in Fig. 2,).ivhich permits of the platen and theconnecting parts being conveniently removed by simply taking oli the capon the vertical box. Byvthis arrangement the eccentric lever is employedto remove the pressure from the press, instead of applying it.

I do not conne myself to the precise form of spring shown, but may makeuse of another style of spring that would be suitable for the purpose. Imay also make use of more than IOO one spring, in which case they couldbe placed underneath the bridge at each side of the center and have abearing on the platen nearer the ends. In large presses this arrangementmightbe necessary, but ordinarily the arrangev ment shown will besufficient. The power of the spring will be in accordance with the sizegf the press and the nature of the work to be one.

Fig. 2 of the drawings is a modification showing a somewhatdifferently-shaped camfoot,which is provided with a curved or eccentricslot.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

l. In a copying-press, the combination,witl1 a platen provided with avertical standard formed integral therewith, of a spring adapted to havea downward pressure bearing on said standard, whereby the requiredpressure is automatically applied to said platen, substantially asdescribed.

2. The combination, with the platen C, provided with the standard D,having the shoulder-bearing a', of the vertical box ci, the chamber a3,and the spring @substantially as andl for the purpose set forth. l 3.rIhe combination, with the platen C an the standard D, of the spring a2,the arched bridge B, and the eccentric-lever E, provided on the lowerend with the cam-foot F, which is connected with the upper end of thestandard D, whereby the platen is raised up from the lbase or bed topermit of the copying matter being removed, substantially as described.

4. The combination, with the base or bed of a copying-press, of thearched bridge B, having a central chambered box provided with aremovable cap, the locking-hooks d d', the 1ever E, having on the lowerend thereof the cam-foot F, the standard D, the spring a2, and theplaten C, substantially as described.

' vGEORGE W'. WILLIAMS.

Witnesses:

L. M. FREEMAN, V. STANwooD.

